MTN the worse service provider

I have had a worse experience that I have ever had in my life, I am a MTN customer for more than 8 years.

I am in the process of registering my child for 2020 academic year, the school requested my MTN invoice for the past 3 months as a proof of address, when I got to the nearest branch which is in N1 city mall, they could not help, asking me to call their customer service line, which was already frustrating after spending Petrol and time to drive to the shop. I had no choice but to call, and spoke with one of the consultants by the name of Ande dukuze, that is where I found out that the address on the invoice is old, I have asked the lady to update it for me, and send me via email a new invoice with my current physical address; only to find out that the new address will only reflect onto the new invoice by the following month. I then asked the lady nicely if she could write an email, accompanying the invoice just to state that the new address will only be updated onto the new invoice by next month; she refused either. Now, I am in a tight spot; I cannot take to school the invoice that has an address that is contrary to the one on my lease agreement, obviously the school will not accept my child application for admission without a second proof of address. They are the first to take customer' s money every month, but when it comes to deliver when customers are in need, they come up with a lot of excuses. I will never and ever recommend or advise anyone to sign up with MTN, they are the worse service provider that I have ever known, coming to the end of my contract, I will try a different SP.